The real nastiness comes when you have some way to cheat the cost of the spell, and get it out early
The latter has more added value for me here, as there is a choice between artifacts and enchantments or creatures, so I can react flexibly to decks I play against
Then, if the enchanted creature dies, you get to return this enchantment to the battlefield at the beginning of the next end step
Finally, with so many uncommon Planeswalkers costing four mana, two- and three-drop creatures get a bit better (since you can use them to protect or pressure Planeswalkers) and more expensive cards get a bit worse (since theyre competing with your Planeswalkers on curve or come down after your opponents Planeswalkers)
Yzma, Alchemist A low-cost Disney Lorcana promo for league players
Miirym has minor protection and only needs to survive a turn cycle and the game is probably over